一尘不染

如何使用Spring Boot Websocket发送二进制文件?

spring-boot

在其他spring平台中,我使用websocket发送二进制消息,如下所示:

  ByteBuffer bf = ByteBuffer.wrap(bytes);
  old.getBasicRemote().sendBinary(bf);

但是通过spring-
boot,我使我的类扩展了TextWebSocketHandler。但是在方法中handleTextMessage(WebSocketSession session, TextMessage message),仅具有参数WebSocketSession,并且没有发送二进制文件的方法。

我尝试使用BinaryMessage,如下所示:

session.sendMessage(new BinaryMessage(bytes));

但是客户端将结果作为Blob(js type)获得,我不知道该怎么办…


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2020-05-30

共1个答案

一尘不染

您可以使用 BinaryWebSocketHandler 处理二进制消息通信。

完整的例子

@Configuration
@EnableAutoConfiguration
@EnableWebSocket
public class AppWebSocket {

    public static void main(String[] args) {
        SpringApplication.run(AppWebSocket.class, args);
    }

    @Component
    public static class MyWebSocketConfigurer implements WebSocketConfigurer {

        @Override
        public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
            registry.addHandler(new MyTextHandler(), "/text").withSockJS();
            registry.addHandler(new MyBinaryHandler(), "/binary").withSockJS();
        }
    }

    @Component
    public static class MyTextHandler extends TextWebSocketHandler {
        public void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
            session.sendMessage(new TextMessage("hello world"));
        }
    }

    @Component
    public static class MyBinaryHandler extends BinaryWebSocketHandler {
        public void handleBinaryMessage(WebSocketSession session, BinaryMessage message) {
            try {
                session.sendMessage(new BinaryMessage("hello world".getBytes()));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}
2020-05-30